There are some icons here, what you can use in your slider. These are svg images, which means, that the browser will draw them. The loading is faster than if you used images, and the quality is perfect with any screen size.
Here are the icons, what you can choose.
The color of the icon in normal state
The color of the icon when the mouse is over it
If you want to put a link into your icon, either just write the link there or click on the Link button, which offers a lightbox option too.
Width and height Expert
You can give a fix size to your icon or let it just be as big as its layer is to keep it responsive.